EM78611

Features: Operating voltage 4.4V ~ 5.25V Low-cost solution for low-speed USB devices, such as keyboard, joystick, and Gamepad. USB Specification Compliance `Universal Serial Bus Specification Version 1.1 `USB Device Class Definition for Human Interface Device (HID), Firmware Specificati...

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EM78611 Picture
SeekIC No. : 004336058 Detail

EM78611: Features: Operating voltage 4.4V ~ 5.25V Low-cost solution for low-speed USB devices, such as keyboard, joystick, and Gamepad. USB Specification Compliance `Universal Serial Bus Specificati...

floor Price/Ceiling Price

Part Number:
EM78611
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/7/20

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Product Details

Description



Features:

  Operating voltage 4.4V ~ 5.25V
 Low-cost solution for low-speed USB devices, such as keyboard, joystick, and Gamepad. 
  USB Specification Compliance
`Universal Serial Bus Specification Version 1.1
`USB Device Class Definition for Human Interface Device (HID), Firmware Specification Version 1.1
`Support 1 device address and 3 endpoints
 USB Application
`P75(D-) has an internal pull-high resistor (1.5K Ohm)
`USB protocol handling
`USB device state handling
`Identifying and decoding of Standard USB commands to EndPoint Zero
 PS/2 Application Support
`Auto-detects PS/2 or USB port
`Build-in PS/2 port interface for keyboard and mouse
 Built-in 8-bit RISC MCU 
`8 level stacks for subroutine and interruption
`Six available interruptions
`8-bit real time clock/counter (TCC) with overflow interruption
`Built-in RC oscillator free running for WatchDog Timer and Dual clock mode
`Two independent programmable prescalers for WDT and TCC
`Two methods of saving power: 
    1. Power-down mode (SLEEP mode) 
    2. Dual clock mode.
`Two clocks per instruction cycle
I/O Ports
`Up to 13 LED sink pins
`Each GPIO pin of Ports 5, 6, 8, and 9; has an internal programmable pull-high  resistor (25K Ohm)
`Each GPIO pin of Port 6, P74~P77, and Port 9 can wakeup the MCU from sleep  mode by input state change
Internal Memory
`Built-in 6K*13 bits Program ROM
`Built-in 144 bytes general purpose registers (SRAM)
`Built-in USB Application FIFOs. 
Operation Frequency
`Normal Mode: MCU runs at the external oscillator frequency; 6MHz or 12MHz
` Dual Clock Mode: MCU runs at the frequency of 256KHz (or 32KHz, 4KHz, 500Hz), emitted by the internal oscillator with the external ceramic resonator (or crystal) turned off to save power.
Built-in 3.3V Voltage Regulator 
`For MCU power supply
`Pull-up source for the external USB resistor on D-pin.
Package Type:  
`40 pin PDIP (EM78611AP) 
`44 pin QFP (EM78611AQ)  ­



Application

·USB Keyboard only.
·USB and PS/2 both compatible with Keyboard.
·USB Keyboard with USB Mouse.
·USB Joystick.



Pinout

  Connection Diagram


Description

The EM78611 is a series of Universal Serial Bus 8-bit RISC microcontrollers. It is specifically  designed for USB low speed device application and to support legacy device such as PS/2  keyboard. The EM78611 also support one device address and three endpoints. With no  firmware involved, these series of microcontrollers can automatically identify and decode  Standard USB Command to EndPoint Zero. 

The EM78611 is implemented on a RISC architecture. It has eight-level stack and six  interrupt sources. Each device has 144 bytes of general purpose SRAM and 6K bytes of  program ROM. The EM78611 has up to 13 pins with the capacity of sinking large current. It  also has dual clock mode which allows the device to run on very low power saving frequency 




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